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Spar Box
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Here I am fitting
the angle reinforcement to the top of the rear half of the spar box.
4/28/00 |
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Here are the end
plates that will be drilled to hold the spar pins later on.
4/28/00 |
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Here I am fitting
the angles that will be the pivot points for the control yoke.
4/28/00 |
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Here I am fitting
the forward half of the spar box in to the fuselage. 4/28/00 |
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Here is a view of
that same part from the rear. This picture as well as the previous one
was taken while the fuselage was still upside down. I have flipped the
pictures to make it easier to view.. 4/28/00 |
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Once both parts
of the spar box were fitted, I took every thing apart to be deburred and
dimpled. The rivets in this area are flush rivets so that the wing spar
won't get hung up on rivet heads as the spars are slid in and out. I used
my Tech Advisor's c-frame and spring back dimple dies to dimple the parts.
4/28/00 |
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I also have to countersink
some of the parts to fit the dimples. I used my microstop to countersink
but I had to modify the end of the stop to fit close to the corner of the
angle. You have to go by trial and error to set the proper depth
on the microstop so that the dimples will fit all the way into the countersink
but not so deep that they are able to slide around. 4/28/00 |
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Here I am checking
the fit of the dimples and countersinks on the rear half of the spar box.
4/28/00 |
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Here I am checking
the fit of both halves. As you can see the rear angle uprights were not
riveted into the fuselage yet. If I had it to do over again I would not
rivet the forward uprights as well. It was tricky to countersink the forward
uprights while they are riveted in place. 4/28/00 |
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Here are all the
parts fitted together. 4/28/00 |
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Here is a look at
the bottom of the fuselage without the bottom skin. you can see all the
cross members that make up the area just under the seat.. 5/13/00 |
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Here is a close
up of where the seat belts will anchor. 5/13/00 |
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Here is a close
up of the elevator push rod idler. It is made a lot like the aileron belcrank
pivot. 5/13/00 |
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Here is one end
of the rear spar carry through. I use my old friend, double sided tape,
to stick every thing together while I drilled and clecoed.
5/13/00 |
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Here is a wide view
of the aft part of the spar box after I have finished rigging the wings
and installing the final rivets. 6/30/00 |
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Here is a look at
the forward part of the spar box. 6/30/00 |
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You may have noticed
on my previous picture one of my innovations to make my plane heavier than
it needs to be. ;-) It is a cup holder that will hold a waterbottle
right between the pilot and passengers legs. I got the waterbottle cage
at my local bike shop. I did not tell them that I was going to put it in
my plane, otherwise they would have charged me triple the price. It is
held in place by flush head machine screws resting in dimples on the sparbox.
6/30/00 |
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 CAUTION:
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© 1999-2000 David Koelzer.
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